Powerhouse first appeared in Nova #2 (October 1976), and was created by Marv Wolfman, John Buscema, and Joe Sinnott.
Powerhouse appeared as part of the "Champions of Xandar" entry in the Official Handbook of the Marvel Universe Deluxe Edition #16.
Powerhouse is a member of Xandarian alien race, with superhuman strength and the ability to absorb energy from any source to temporarily enhance his physical strength fiftyfold, absorb the energy from a weapon used against him and redirect it against an assailant, and even create a psionic link with an opponent with whom he is in physical contact so as to control his opponent's use of his or her own powers.
Before Davan could report on Zorr's activities, his ship was hit by a meteor shower and careened off-course, eventually crossing the space of galaxies and landing in a body of water on Earth.
Beast was giving a lecture at ESU on genetics and Powerhouse decided to show up and send her anti-human message there.
[6] Wolverine and Warbird saw a news report of Powerhouse attacking the area around the U.N. building, where an international debate on human-mutant relations was to happen.
One of the men present at the bank at the time of the hold-up became infatuated with Powerhouse, and subsequently visited her in prison, which he intended to continue to do every two weeks for the next seven years, as she served her sentence.